staging: rtl8712: fix unnecessary elses after return/break in rtl8712_efuse.c

This patch fixes two unnecessary else conditions that were found by checkpatch.pl.

Signed-off-by: Serguey Parkhomovsky <sergueyparkhomovsky@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>